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irynasherem02
irynasherem02
17.10.2021 08:43 •  Математика

Средний возраст пяти девочек группы 10,4 года.после прихода в группу новенькой девочки средний возраст шести девочек составил 10 лет.сколько лет новой девочке? решение по действиям! с пояснениями.

👇
Ответ:
pervushinapolina
pervushinapolina
17.10.2021
Ну смотри: средний возраст всех пяти = (сумма возрастов пяти девочек)/5 = 10,4 
сумма возрастов пяти девочек = 10,4*5 = 52 года 
 
средний возраст всех пяти = (сумма возрастов шести девочек)/6 = 10 
сумма возрастов шести девочек = 10*6 = 60 лет 
Значит, новенько (60-52)=8 лет 
ответ: 8 лет
4,7(85 оценок)
Ответ:
sirius830
sirius830
17.10.2021
1)10,4*5=52 года - общий возраст 5 девочек 
2)10*6=60 лет - общий возраст новенькой и 5 девочек
3)60-52=8 лет
ответ - 8 лет
4,7(90 оценок)
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Ответ:
ekaterrrrr
ekaterrrrr
17.10.2021
I think summer is the best season of all because it is warm, the nature is beautiful and we have great opportunities for rest. Summer is a time of holidays. We can go anywhere, spend our time near a river or a lake on fresh, green grass, swim in warm water, or climb mountains, play different games, ride a bicycle and so on.

I spend my summer holidays at my granny’s. There are many things there to do. What I did most of the time - I swam in the sea and sunbathed. Sometimes I made a fire with my friends at the seaside and cooked potatoes there. It was wonderful. We told anecdotes to each other, and did everything we wanted. I also got used to walk alone in the forest.

When August was coming to its end, I went on a small voyage by ship. The ship name was “Sevastopol”.

But this summer wasn’t for me only sugar and honey. I have passed through the graduating exams after school and entering exams in the university. So the bigger part of my summer vacations I spent sitting with the books. Of course, it was not interesting, but I’m glad that I did it because now I’m a student of the best university in our country.

4,6(45 оценок)
Ответ:
salavatshakiro
salavatshakiro
17.10.2021
I think summer is the best season of all because it is warm, the nature is beautiful and we have great opportunities for rest. Summer is a time of holidays. We can go anywhere, spend our time near a river or a lake on fresh, green grass, swim in warm water, or climb mountains, play different games, ride a bicycle and so on.

I spend my summer holidays at my granny’s. There are many things there to do. What I did most of the time - I swam in the sea and sunbathed. Sometimes I made a fire with my friends at the seaside and cooked potatoes there. It was wonderful. We told anecdotes to each other, and did everything we wanted. I also got used to walk alone in the forest.

When August was coming to its end, I went on a small voyage by ship. The ship name was “Sevastopol”.

But this summer wasn’t for me only sugar and honey. I have passed through the graduating exams after school and entering exams in the university. So the bigger part of my summer vacations I spent sitting with the books. Of course, it was not interesting, but I’m glad that I did it because now I’m a student of the best university in our country.

4,4(49 оценок)
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